(a)

The depth  of the tide on a beach is , where .

Where corresponds to midnight to next midnight.

Table : 

Construct a table for different values of time.

Time	Depth in meters
	\ \

Observe the table, the maximum depth, or high tide, that day was 11 meters.

(b)

The high tides occurred when and , where corresponds  A.M. and corresponds to

P.M.

(a)

Construct a table for different values of time.

Time	Depth in meters
	\ \

(b)

High tides occurred A.M and P.M.